On 07/31/2014 03:27 PM, John C Klensin wrote:
>
> Two observations (not further complaints or justification for
> leaving this open unless others agree):
>
> (i) Unless there is general consensus that Unicode's attempt to
> introduce an unambiguous Line Separator in form of U+2028 has
> been a complete failure, I suppose the CSS document would be
> better off either including it as an additional alternative (to
> "... document languageâdefined segment break, CRLF sequence
> (U+000D U+000A), carriage return (U+000D), and line feed
> (U+000A)...") or mentioning why it is not so included.
White space handling and forced line break handling in CSS
are two very distinct operations. U+2028 is not white space
in the CSS sense: it is not affected by collapsing, and is
never discarded as such.
However, it is respected as a forced line break character if
it happens to occur in the document stream.
See, specifically, the first bullet point in 5.1 Line Breaking Details
http://www.w3.org/TR/css-text-3/#line-break-details
> (ii) I believe that the Unicode Standard discussion of "NLF"
> represents a better approach than the indifference ("does not
> define...") expressed in the CSS spec. I.e., one should be
> permissive in what is accepted but should canonicalize all of
> them
> to a single preferred form. But that obviously isn't the way
> the spec if going.
Not sure why you think it does not canonicalize line breaks.
The spec says
# When white-space is pre, pre-wrap, or pre-line, segment
# breaks are not collapsible and are instead transformed
# into a preserved line feed (U+000A).
http://www.w3.org/TR/css-text-3/#line-break-transform
The spec does not define what a segment break is because that
depends on the document language. In HTML it is an LF, CR, or
CRLF sequence; but in SGML other options are possible. (CSS is
defined to style a document tree; it doesn't care if the
document tree is HTML, DocBook XML, or some other format.)
~fantasai
Received on Saturday, 2 August 2014 07:04:00 UTC
RetroSearch is an open source project built by @garambo | Open a GitHub Issue
Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo
HTML:
3.2
| Encoding:
UTF-8
| Version:
0.7.4